Also I have seen people getting replies when raising CSE and if they are put into SS like " You application is transferred to a special unit and is still in process. While this review will result in an additional delay rest assured we will make sure your application gets finalized soon"
For me they said," We verified the information you provided and are pleased to inform you that everything appears to be in order with the application.
Rest assured that you will be informed as soon as a decision is reached or if additional information is needed."
I got a reply similar to yours several time after crossing 6 months. Even the note received after that did not show any sign of SS